Resilient gear-wheel.



-G.'M. EATON.

' BESILIENT GEAR WHEEL;

A APPLICATION FILED ran. 1. m6. v i I I z susns-snzz 6eorje M Ea fan.

NiTED STATES," PATENT OFFICE' GEORGE N. EATON, or PITTSBURGH, PENNSYLVANJfA, ASSIGNOR TO wmmenom' nnsc'mro'mn MANUFACTURING COMPANY, A conroiuu'roN or PENNSYLVANIA.

BESILIENT GEAR-WHEEL.

To all whom it may concern: i Be it knowncthat I, GEORGE M. Enron, a 1 citizenof the United States, and a resident of Pittsburgh, in the county otA'llegheny and State of Pennsylvania, have invented a new'and useful Improvement in Resilient specification.

Gear-Wheels, of which the following is avide a gear wheel of the above indicated character that shall .have the teeth thereof divided, into separate portions and mounted on difierent members of the gear wheel so that each-gear tooth may have contact with the enmeshing gear at at least two points.

More specifically, the object of my invention is to provide a car wheel embodying a hubmelnber, a com ound rim consistm of a plurality of rim members and res ent means for joining the individual rim mem- 5 hereto the'hub member, therim members tndths'liubiheniber being'adapted to rigidi'y'sngage each other after a limited rela- 85 tive rotational movement therebetween. v In thealceom anying drawing illustrating "Jmy;invention igure-l is a side elevation,

partly insection, of a gear wheel construct- 'edili' accordancewith my invention; Fig.2, 40

is a section along the line JIL-IIof .Fi'gil I andF' I 3and4are'viewsofa tpinion-en geaif'rwj eelfconstructedfin accor ance with f? my ;-i1iveiit1on" and provlded with herring boneand citroen teeth, respectively.

i gear 'wheel 1 is shown embodying gear 2', a hub memberli mounted upon a, shaft 4, rim members 5 and 6, and resilient nnectors 7. The hub member '3 is provlded with 'a laterally projecting crank pin 8 and radial" projections 9, '10 and 11.. ,The

My invention relates to resilient gear.

Another object of my invention is to we Referring to Figs. 1 and 2 at the drawing;

speolflcation of Letters Patent. Patented Sept, 24 1918, Application filed February 7, 1918. Serial Ijio. 76,801.

any manner well known in the art. The rim 'member 5 is provided with portionsfl of the gear teeth 2 and inward radial promot ons 12 which are disposed between, and reglster with the hub projections 10 and I l. The rim memberfiis provided with ortiops of the gear teeth 2 and inward'ra ial mectwns 13 which are disposed between and register with the hub projections 9 and 10.

With the rim projections 12 and 13 registermg'with the hub projections 9, 10 and 11, apertures 14 are, formed, in which the connectors 7- are disposed, one connector being placed ineach apertureforeach rim member.

The connectors 7 are similar to the connectors disclosed in my application for a patent on a resilient gear, SerialNo. 58,166, filed October 27, 1915. Eachof the connec-; tors embodies two retaining members 15 and 16 and a coil spring I'Zdisposed thereon. The retaining nembers'15 and-16 are provided with shanks 18 and 19 for suppdrtin the springs 17 and with cylindrioally curv surfaces 20, '21 20! and 21" for preventing them from having movement radiallyor laterally with respect to the hub and rim members; Each of thejcylindricall'y curved surfaces 21 should have a width 'equal to that of each'of the rim projections 12 and 13 and be adapted to extend between the proje'ctions 10 and 1101' the projections 9 and 10 into engagement with the projections 12 or the pro ect1ons 13; Ehchhetainin mem-' ber 15 15 provided with twocylin ieally curved surfaces 20 which "are. ada ted to i engage the projections 9 and 10 or proections 10 and 11 of the "hub member and a cylindrical surface 21' whichisiada 'ted to engage projections 12 in'g members :16 are raised above the eylinl whereby the retaining members 7 i are pre- 'dr1calsurface's20, and the cylindrical surfaces 20 on the-retaining member- 15 are raised above the cylindrical surface 21.;

vented from having any lateral movement relative to the gear wheel,v when in operative position, since theprojections 12 on the rim membersengage the cylindrical sure 1 I faces-21" between] the cylindrical surfaces 20? on one end of the'tonnecto cylindrical surface 21, on theot lixa connectors engage the projections 12 and 13 and are disposed between the hub projections 9, 'lQua nd 11.

' The rim projections 12 and 13 are pro vided witheylin'drically curved seats which are adapted to engage the eylindrieally curved surfaces 21 and 21 of the connectors.

The cylindrically curved surfaces 20 and 20" of the connectors are adapted to enga e sim ;;ilar cylindrically curved surfaces on t e hub {member 3. v

*7" Referring to Fig. 3 of the drawing a gear 'iwheel-22, constructed in accordance with my invention, is shown enmeshing witha pmion 23. The

members 2i and 25 and herring-bone or double-helical teeth 26'.- Each of the teeth 26 has a portionv 26 mounted upon the rim member 24 and a'portion 26 mounted upon ,19 r m member 25. Thepinion .23 is shown with a unitary-rim member but may be constructed' with adivisible rim, if so desired. In many cases, it is desirable to have enmeshing gear wheels and pinions provided 1 with citroen teeth, but trouble is experienced with this type f te'etli' in casethe teeth fail to mesh properly. The failure of the gear wheels and pinions to mesh properly, when provided with eitroen teeth, may be due to 30 faulty assembling of thegear wheel or the pinion upon its shaft or improper location of the shafts themselves and to defects in the teeth themselves. I

However, gear wheels provided with citroen. teeth and constructed in accordance with my inventionmay be combined'with a pinionhavingi eitroen teeth without experiencin thedi; ,culties aboVe-set forth.

Re erring to Fig. 4, 11. pinion27' provided 40 with ci'troen teeth is shown enmeshing with a gear wheel 28 having x'iitro'en teeth 29., The rim. of the gear wheel 27-is constructed 1n two parts'30 andso as to .divide each eitroen tooth-int'o tv'vo 'ual portions.

In assembling the gear illustrated in Figs. 1 and 2 the rim members 5-and 6 are placed on the ub member,3,"- with the PIOiOCtIOIIS 12 and 13 dis' "osed between the pro ections.

10' and 11 an the pro ections 9 and 10, re- 60 speetively. :Th'e shub-and rim pro ectlon's should be of' 'the samealength in or er that 1 they properlyinterloek with the; connectors The connectors *7 are inserted in' the apertures14,,1with the-cylindrically curved sun I faces g-l and 21 m engagement with the rim projections 12.;and .1? and; the eylindrically curved surfaces 20 and 20 in engagement with the hub projections 9,, 10 and 11.

In operatingtheggear. wheel, the rim mem "bers 5 and fimay have relative movement as to each other and as to the hub member 3. However, after a-limited rotational movement of either of the rim members 5 and 6 relative to the hub member 3, the shanks 18 and 1.9 of the connectors will engage each gear wheel is provided with rim rim members, severally,

strained mowement of member relative to sald'hub member and my invention, and I desire that only such limitations shall be lmposed as are indicated,

in the appended claims.

I claim as my invention:

1'. A- resilient wheel. com rising a hub and a plurality of rim members surrounding the same, and means for-resiliently and severallyconnecting said rim members to the hub member to permit relative movement between the. rim 'members, severally, and between the rim members and the hub member.

2. In a gear wheel, the combination with a hub member having .a plurality of radial projections, and a plurality of rim members having integral radial projections extending therefrom, of means for resiliently joining said projections and for permitting relative rotative movement between said rim members.

' bers surrounding the hub, and means for resiliently and severally connecting said rim members to the hub member to permit rela tive movement between the rlm members, severally, and between the rim members and the hub member.

5. A resilient eachiof the rim members being provided andmeans fo1-resiliently and severally connecting said rim members to the hub memb er to permit relative movement between the members and the hub member, whereby errors in the form ofthe teeth of-said rim members may be compensated for to insure 'fullworking contact of each complete tooth .with the cooperatingof the gear wheel teeth oi r'a mating gear. J

6. In a resilient gear wheel, the combination with ahub member and aplurality of rim members, ofmeansfor permitting rethe individual rim means for rigidly, joining any of'the rim members to the hub member after a limited relatlve rotation thcrebetwecn.

gear wheel comprising a hub, a plurality of rim members surrounding the same,

and between the rim with peripheral gear teeth,

Ina resilient gear wheel, the combiriation with a hub member having radial proectlons and a crank pm extending laterally therefrom, and a plurality of rim n'lembers surrounding saidlnib member, of resilient means for oining said hub and run members. i

8. A resilient gear wheel comprisin a hub, a plurality of members surroun mg the same, each of the rim members bein rovided with peripheral gear teethof helica iorm, and means for resiliently and severally connecting said rim mcmbersto the hub men'iber to permit relative movement between'thr rim members, severally, and between the rim members, and the hub memher, whereby errors in the form of the teeth of said rim members unay be compensated for to insure full working contact of each' complete tooth of the gear wheel with the cooperating teeth of a mating ear.

9. In a resilient gear wheel, I; e combinalion with a hub member and a plurality of rim members surrounding said hub member, of resilient means for severally joining said rim members to said hub member whereby the individual rim members and the hub member-may have limited rotational movement relative to each'other.

hub member, said means beingrestrained from lateral movement bysaid hub and rim members.

ll. In a' resilient gear wheel, the combination with a hub member having radial pro jections extendingtherefrom, and two rim members surrounding said hub member and having radial projections which register with said huh projections, of a plurality of spring connectors for severally joining the rim members to said hub member.

l2; A gear wheel con'iprising a hub memher having radial projections extending therefrom, a plurality of rim members having integral radial projections which regis:

(er with said hub projections, means for re siliently' ioining said members, and citroen teeth formed on'said rim members.

i The combination with a pinion having a single series of integral cilroen teeth, of a gear wheel enmeshin said pinion and provided wilh teeth divided into portions which may have limited rotative movement relative to one another;

1%. The combination with a geaij'wheel comprising a hub member and rim members resiliently joined to said hub member and provided with eitroen. teeth of a pinion having single series of eitroen teeth enmeshing with said rim members.

15}. The combination with aresilient gear wheel. having citroen teeth thereon and embodying a hub member and rim members, and a pinion having a single series of teeth comes-hing with said gear wheel, of mea 1is. lo! msurlng more than one pomtof contaut. hi-lwoen each pair of moshing teeth on lhv said gearwheel and said pinion.

1n iestin'iony whereof. l, have hereunto subscribed my name this 28th d y of January, 1916. 

